
26
RLC-SVN005B-EN
RTHC Units with IT (or Wye-Delta) Starter
Removal of Existing Starter
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power cannot be inadvertently
energized. For variable frequency drives or other energy
storing components provided by Trane or others, refer to
the appropriate manufacturer’s literature for allowable
waiting periods for discharge of capacitors. Verify with
an appropriate voltmeter that all capacitors have
discharged. Failure to disconnect power and discharge
capacitors before servicing could result in death or
serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN.
The following components of an Intelligent Technology
(IT) SSS need to be removed prior to installing the
Benshaw RediStart starter:
•
Intelligent Technology (IT) Starter
•
MOV
•
1PS
•
1K400 (replace)
•
1TB1
For units with wye-delta starters, remove the associated
contactors and resistors. See
for an example.
shows the basic layout of the IT starter
with the components that need to be removed
highlighted.
Figure 24.
Remove the highlighted components (IT starter) — RTHC
IT
Solid
State
Starter
IT
Starter
1U2 STARTER MODULE
1U5 OPTIONS MODULE (OPTIONAL)
1U6 TCI COM 3
OR COM 4 MODULE
(OPTIONAL)
1U3 STEPPER MODULE
1U1 CHILLER MODULE
1U7 PRINTER
INTERFACE MODULE
(OPTIONAL)
1K400
or 1K11
1PS
1T5
1F4
1F3
1F2
1F1
1MOV
1TB or 1CB1
T3
1TB1